Mission San Juan Bautista is a Spanish mission in San Juan Bautista, San Benito County, California. Founded on June 24, 1797 by Fermín Lasuén of the Franciscan order, the mission was the fifteenth of the Spanish missions established in present-day California. Named for Saint John the Baptist, the mission is the namesake of the city of San Juan Bautista.

Who was mission san juan capistrano named after? Let's have some stream of consciousness first.
To answer this question, we should know that: Named for Saint John the Baptist, the mission is the namesake of the city of San Juan Bautista. So, the answer is Saint John the Baptist.